./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e3fe12f9ba7a27693660ab3b9c436489448c0880075d8a5a83d98427fc7a74d3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:50:25,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:50:25,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:50:25,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:50:25,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:50:25,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:50:25,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:50:25,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:50:25,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:50:25,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:50:25,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:50:25,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:50:25,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:50:25,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:50:25,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:50:25,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:50:25,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:50:25,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:50:25,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:50:25,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:50:25,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:50:25,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:50:25,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:50:25,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:50:25,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:50:25,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:50:25,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:50:25,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:50:25,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:50:25,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:50:25,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:50:26,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:50:26,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:50:26,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:50:26,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:50:26,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:50:26,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:50:26,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:50:26,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:50:26,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:50:26,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:50:26,006 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:50:26,026 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:50:26,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:50:26,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:50:26,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:50:26,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:50:26,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:50:26,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:50:26,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:50:26,028 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:50:26,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:50:26,029 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:50:26,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:50:26,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:50:26,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:50:26,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:50:26,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:50:26,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:50:26,030 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:50:26,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:50:26,031 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:50:26,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:50:26,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:50:26,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:50:26,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:50:26,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:50:26,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:50:26,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:50:26,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:50:26,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:50:26,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:50:26,032 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:50:26,033 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:50:26,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:50:26,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3fe12f9ba7a27693660ab3b9c436489448c0880075d8a5a83d98427fc7a74d3 [2022-11-18 19:50:26,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:50:26,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:50:26,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:50:26,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:50:26,339 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:50:26,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2022-11-18 19:50:26,422 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/data/e29cf915e/cca9eda59db84ba4be44f29e6490b89d/FLAG645de9a8e [2022-11-18 19:50:26,853 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:50:26,854 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2022-11-18 19:50:26,875 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/data/e29cf915e/cca9eda59db84ba4be44f29e6490b89d/FLAG645de9a8e [2022-11-18 19:50:27,233 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/data/e29cf915e/cca9eda59db84ba4be44f29e6490b89d [2022-11-18 19:50:27,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:50:27,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:50:27,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:50:27,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:50:27,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:50:27,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42076df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27, skipping insertion in model container [2022-11-18 19:50:27,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:50:27,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:50:27,538 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c[6899,6912] [2022-11-18 19:50:27,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:50:27,552 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:50:27,592 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c[6899,6912] [2022-11-18 19:50:27,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:50:27,608 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:50:27,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27 WrapperNode [2022-11-18 19:50:27,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:50:27,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:50:27,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:50:27,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:50:27,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,655 INFO L138 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 228 [2022-11-18 19:50:27,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:50:27,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:50:27,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:50:27,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:50:27,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,685 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:50:27,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:50:27,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:50:27,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:50:27,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (1/1) ... [2022-11-18 19:50:27,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:50:27,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:27,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:50:27,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:50:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:50:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:50:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:50:27,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:50:27,852 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:50:27,854 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:50:28,296 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:50:28,305 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:50:28,305 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 19:50:28,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:50:28 BoogieIcfgContainer [2022-11-18 19:50:28,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:50:28,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:50:28,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:50:28,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:50:28,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:50:27" (1/3) ... [2022-11-18 19:50:28,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a443fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:50:28, skipping insertion in model container [2022-11-18 19:50:28,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:27" (2/3) ... [2022-11-18 19:50:28,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a443fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:50:28, skipping insertion in model container [2022-11-18 19:50:28,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:50:28" (3/3) ... [2022-11-18 19:50:28,322 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2022-11-18 19:50:28,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:50:28,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:50:28,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:50:28,405 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5c541813, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:50:28,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:50:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 68 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:50:28,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:28,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:28,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1425545932, now seen corresponding path program 1 times [2022-11-18 19:50:28,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:28,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237008198] [2022-11-18 19:50:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:28,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:28,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:28,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237008198] [2022-11-18 19:50:28,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237008198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:28,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:28,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:50:28,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443125832] [2022-11-18 19:50:28,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:28,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:50:28,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:50:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:50:28,951 INFO L87 Difference]: Start difference. First operand has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 68 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:29,055 INFO L93 Difference]: Finished difference Result 115 states and 189 transitions. [2022-11-18 19:50:29,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:50:29,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-18 19:50:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:29,069 INFO L225 Difference]: With dead ends: 115 [2022-11-18 19:50:29,069 INFO L226 Difference]: Without dead ends: 65 [2022-11-18 19:50:29,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:50:29,076 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 3 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:29,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 400 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-18 19:50:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-18 19:50:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.40625) internal successors, (90), 64 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2022-11-18 19:50:29,116 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 25 [2022-11-18 19:50:29,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:29,117 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2022-11-18 19:50:29,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2022-11-18 19:50:29,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 19:50:29,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:29,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:29,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:50:29,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1477219222, now seen corresponding path program 1 times [2022-11-18 19:50:29,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:29,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076088644] [2022-11-18 19:50:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:29,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:29,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:29,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076088644] [2022-11-18 19:50:29,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076088644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:29,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:29,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:29,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983963506] [2022-11-18 19:50:29,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:29,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:50:29,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:29,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:50:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:29,282 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:29,333 INFO L93 Difference]: Finished difference Result 141 states and 210 transitions. [2022-11-18 19:50:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:50:29,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-18 19:50:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:29,342 INFO L225 Difference]: With dead ends: 141 [2022-11-18 19:50:29,343 INFO L226 Difference]: Without dead ends: 99 [2022-11-18 19:50:29,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:29,348 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:29,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 187 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-18 19:50:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-11-18 19:50:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 141 transitions. [2022-11-18 19:50:29,362 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 141 transitions. Word has length 41 [2022-11-18 19:50:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:29,368 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 141 transitions. [2022-11-18 19:50:29,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 141 transitions. [2022-11-18 19:50:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 19:50:29,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:29,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:29,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:50:29,375 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:29,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1000300971, now seen corresponding path program 1 times [2022-11-18 19:50:29,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:29,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256595677] [2022-11-18 19:50:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:29,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:29,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:29,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256595677] [2022-11-18 19:50:29,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256595677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:29,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:29,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:50:29,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54344968] [2022-11-18 19:50:29,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:29,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:50:29,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:29,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:50:29,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:50:29,624 INFO L87 Difference]: Start difference. First operand 97 states and 141 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:29,780 INFO L93 Difference]: Finished difference Result 393 states and 613 transitions. [2022-11-18 19:50:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:50:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-18 19:50:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:29,783 INFO L225 Difference]: With dead ends: 393 [2022-11-18 19:50:29,784 INFO L226 Difference]: Without dead ends: 319 [2022-11-18 19:50:29,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:50:29,786 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 397 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:29,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 370 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:50:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-18 19:50:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 169. [2022-11-18 19:50:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5119047619047619) internal successors, (254), 168 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 254 transitions. [2022-11-18 19:50:29,813 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 254 transitions. Word has length 41 [2022-11-18 19:50:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:29,814 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 254 transitions. [2022-11-18 19:50:29,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 254 transitions. [2022-11-18 19:50:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 19:50:29,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:29,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:29,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:50:29,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:29,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:29,817 INFO L85 PathProgramCache]: Analyzing trace with hash 561235574, now seen corresponding path program 1 times [2022-11-18 19:50:29,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:29,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482397921] [2022-11-18 19:50:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:29,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:30,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482397921] [2022-11-18 19:50:30,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482397921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:30,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:30,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:50:30,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090165146] [2022-11-18 19:50:30,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:30,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:50:30,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:50:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:50:30,080 INFO L87 Difference]: Start difference. First operand 169 states and 254 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:30,198 INFO L93 Difference]: Finished difference Result 331 states and 501 transitions. [2022-11-18 19:50:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:50:30,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-18 19:50:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:30,205 INFO L225 Difference]: With dead ends: 331 [2022-11-18 19:50:30,205 INFO L226 Difference]: Without dead ends: 329 [2022-11-18 19:50:30,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:50:30,217 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 180 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:30,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 404 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-18 19:50:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 181. [2022-11-18 19:50:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4777777777777779) internal successors, (266), 180 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 266 transitions. [2022-11-18 19:50:30,269 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 266 transitions. Word has length 42 [2022-11-18 19:50:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:30,271 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 266 transitions. [2022-11-18 19:50:30,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 266 transitions. [2022-11-18 19:50:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 19:50:30,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:30,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:30,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:50:30,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash 271012067, now seen corresponding path program 1 times [2022-11-18 19:50:30,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:30,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929154805] [2022-11-18 19:50:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:30,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:30,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:30,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929154805] [2022-11-18 19:50:30,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929154805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:30,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:30,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:30,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684086784] [2022-11-18 19:50:30,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:30,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:50:30,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:30,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:50:30,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:30,380 INFO L87 Difference]: Start difference. First operand 181 states and 266 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:30,428 INFO L93 Difference]: Finished difference Result 467 states and 702 transitions. [2022-11-18 19:50:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:50:30,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-18 19:50:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:30,432 INFO L225 Difference]: With dead ends: 467 [2022-11-18 19:50:30,432 INFO L226 Difference]: Without dead ends: 309 [2022-11-18 19:50:30,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:30,436 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 39 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:30,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 149 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-18 19:50:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 303. [2022-11-18 19:50:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.4768211920529801) internal successors, (446), 302 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 446 transitions. [2022-11-18 19:50:30,473 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 446 transitions. Word has length 43 [2022-11-18 19:50:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:30,474 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 446 transitions. [2022-11-18 19:50:30,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 446 transitions. [2022-11-18 19:50:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 19:50:30,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:30,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:30,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:50:30,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1222671217, now seen corresponding path program 1 times [2022-11-18 19:50:30,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:30,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450801877] [2022-11-18 19:50:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:30,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:30,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:30,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450801877] [2022-11-18 19:50:30,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450801877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:30,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:30,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:30,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723420527] [2022-11-18 19:50:30,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:30,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:50:30,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:50:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:30,568 INFO L87 Difference]: Start difference. First operand 303 states and 446 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:30,657 INFO L93 Difference]: Finished difference Result 799 states and 1180 transitions. [2022-11-18 19:50:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:50:30,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-18 19:50:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:30,661 INFO L225 Difference]: With dead ends: 799 [2022-11-18 19:50:30,661 INFO L226 Difference]: Without dead ends: 519 [2022-11-18 19:50:30,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:30,665 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 47 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:30,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 185 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-18 19:50:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 517. [2022-11-18 19:50:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.449612403100775) internal successors, (748), 516 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 748 transitions. [2022-11-18 19:50:30,743 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 748 transitions. Word has length 44 [2022-11-18 19:50:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:30,745 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 748 transitions. [2022-11-18 19:50:30,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 748 transitions. [2022-11-18 19:50:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 19:50:30,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:30,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:30,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:50:30,751 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1273029565, now seen corresponding path program 1 times [2022-11-18 19:50:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:30,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103982606] [2022-11-18 19:50:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:30,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:30,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:30,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103982606] [2022-11-18 19:50:30,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103982606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:30,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:30,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:30,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15418549] [2022-11-18 19:50:30,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:30,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:50:30,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:30,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:50:30,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:30,826 INFO L87 Difference]: Start difference. First operand 517 states and 748 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:30,911 INFO L93 Difference]: Finished difference Result 1004 states and 1466 transitions. [2022-11-18 19:50:30,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:50:30,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-18 19:50:30,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:30,915 INFO L225 Difference]: With dead ends: 1004 [2022-11-18 19:50:30,916 INFO L226 Difference]: Without dead ends: 721 [2022-11-18 19:50:30,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:30,917 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 52 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:30,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 197 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-11-18 19:50:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 719. [2022-11-18 19:50:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.434540389972145) internal successors, (1030), 718 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1030 transitions. [2022-11-18 19:50:31,011 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1030 transitions. Word has length 45 [2022-11-18 19:50:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:31,012 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1030 transitions. [2022-11-18 19:50:31,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1030 transitions. [2022-11-18 19:50:31,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 19:50:31,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:31,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:31,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:50:31,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1258504631, now seen corresponding path program 1 times [2022-11-18 19:50:31,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:31,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900514921] [2022-11-18 19:50:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:50:31,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:31,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900514921] [2022-11-18 19:50:31,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900514921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:31,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:31,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:50:31,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977201625] [2022-11-18 19:50:31,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:31,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:50:31,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:31,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:50:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:50:31,182 INFO L87 Difference]: Start difference. First operand 719 states and 1030 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:31,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:31,358 INFO L93 Difference]: Finished difference Result 1659 states and 2418 transitions. [2022-11-18 19:50:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:50:31,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-18 19:50:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:31,365 INFO L225 Difference]: With dead ends: 1659 [2022-11-18 19:50:31,365 INFO L226 Difference]: Without dead ends: 1305 [2022-11-18 19:50:31,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:50:31,367 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 236 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:31,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 403 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2022-11-18 19:50:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1059. [2022-11-18 19:50:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 1.438563327032136) internal successors, (1522), 1058 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1522 transitions. [2022-11-18 19:50:31,486 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1522 transitions. Word has length 63 [2022-11-18 19:50:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:31,487 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1522 transitions. [2022-11-18 19:50:31,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1522 transitions. [2022-11-18 19:50:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 19:50:31,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:31,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:31,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 19:50:31,494 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash -26861640, now seen corresponding path program 1 times [2022-11-18 19:50:31,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:31,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427147524] [2022-11-18 19:50:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:31,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:50:31,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:31,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427147524] [2022-11-18 19:50:31,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427147524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:31,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:31,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:50:31,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300047998] [2022-11-18 19:50:31,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:31,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:50:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:50:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:50:31,654 INFO L87 Difference]: Start difference. First operand 1059 states and 1522 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:31,842 INFO L93 Difference]: Finished difference Result 1999 states and 2910 transitions. [2022-11-18 19:50:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:50:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-18 19:50:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:31,875 INFO L225 Difference]: With dead ends: 1999 [2022-11-18 19:50:31,875 INFO L226 Difference]: Without dead ends: 1645 [2022-11-18 19:50:31,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:50:31,877 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 242 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:31,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 381 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:31,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-11-18 19:50:31,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1399. [2022-11-18 19:50:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 1.4406294706723892) internal successors, (2014), 1398 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2014 transitions. [2022-11-18 19:50:32,000 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2014 transitions. Word has length 63 [2022-11-18 19:50:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:32,001 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 2014 transitions. [2022-11-18 19:50:32,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2014 transitions. [2022-11-18 19:50:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 19:50:32,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:32,003 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:32,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 19:50:32,003 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:32,004 INFO L85 PathProgramCache]: Analyzing trace with hash -618172044, now seen corresponding path program 1 times [2022-11-18 19:50:32,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:32,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599618264] [2022-11-18 19:50:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:32,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:32,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:32,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599618264] [2022-11-18 19:50:32,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599618264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:32,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:32,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53089247] [2022-11-18 19:50:32,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:32,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:50:32,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:32,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:50:32,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:32,092 INFO L87 Difference]: Start difference. First operand 1399 states and 2014 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:32,249 INFO L93 Difference]: Finished difference Result 2775 states and 4004 transitions. [2022-11-18 19:50:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:50:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-18 19:50:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:32,255 INFO L225 Difference]: With dead ends: 2775 [2022-11-18 19:50:32,255 INFO L226 Difference]: Without dead ends: 1401 [2022-11-18 19:50:32,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:32,258 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 42 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:32,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 185 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:32,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-11-18 19:50:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1399. [2022-11-18 19:50:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 1.4234620886981402) internal successors, (1990), 1398 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1990 transitions. [2022-11-18 19:50:32,387 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 1990 transitions. Word has length 64 [2022-11-18 19:50:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:32,388 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 1990 transitions. [2022-11-18 19:50:32,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 1990 transitions. [2022-11-18 19:50:32,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 19:50:32,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:32,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:32,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 19:50:32,390 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:32,391 INFO L85 PathProgramCache]: Analyzing trace with hash -231923725, now seen corresponding path program 1 times [2022-11-18 19:50:32,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:32,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852993690] [2022-11-18 19:50:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:32,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:33,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:33,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852993690] [2022-11-18 19:50:33,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852993690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:33,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839708107] [2022-11-18 19:50:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:33,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:33,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:33,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:33,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:50:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:34,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:50:34,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:50:34,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:50:34,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839708107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:34,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:34,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 17 [2022-11-18 19:50:34,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546882219] [2022-11-18 19:50:34,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:34,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:50:34,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:50:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:50:34,567 INFO L87 Difference]: Start difference. First operand 1399 states and 1990 transitions. Second operand has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:42,230 INFO L93 Difference]: Finished difference Result 14917 states and 20982 transitions. [2022-11-18 19:50:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-18 19:50:42,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-18 19:50:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:42,275 INFO L225 Difference]: With dead ends: 14917 [2022-11-18 19:50:42,275 INFO L226 Difference]: Without dead ends: 13955 [2022-11-18 19:50:42,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2022-11-18 19:50:42,284 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 3935 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3935 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:42,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3935 Valid, 2283 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 19:50:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13955 states. [2022-11-18 19:50:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13955 to 6643. [2022-11-18 19:50:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 6642 states have (on average 1.394459500150557) internal successors, (9262), 6642 states have internal predecessors, (9262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 9262 transitions. [2022-11-18 19:50:43,161 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 9262 transitions. Word has length 64 [2022-11-18 19:50:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:43,161 INFO L495 AbstractCegarLoop]: Abstraction has 6643 states and 9262 transitions. [2022-11-18 19:50:43,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.470588235294118) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 9262 transitions. [2022-11-18 19:50:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-18 19:50:43,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:43,163 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:43,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:43,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 19:50:43,374 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:43,375 INFO L85 PathProgramCache]: Analyzing trace with hash -812650598, now seen corresponding path program 1 times [2022-11-18 19:50:43,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:43,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553106401] [2022-11-18 19:50:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:50:43,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553106401] [2022-11-18 19:50:43,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553106401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:43,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:43,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:50:43,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939093447] [2022-11-18 19:50:43,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:43,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:50:43,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:50:43,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:50:43,471 INFO L87 Difference]: Start difference. First operand 6643 states and 9262 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:44,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:44,210 INFO L93 Difference]: Finished difference Result 10481 states and 14706 transitions. [2022-11-18 19:50:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:50:44,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-18 19:50:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:44,270 INFO L225 Difference]: With dead ends: 10481 [2022-11-18 19:50:44,271 INFO L226 Difference]: Without dead ends: 9225 [2022-11-18 19:50:44,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:50:44,275 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 229 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:44,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 419 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9225 states. [2022-11-18 19:50:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9225 to 7889. [2022-11-18 19:50:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7889 states, 7888 states have (on average 1.3932555780933062) internal successors, (10990), 7888 states have internal predecessors, (10990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7889 states to 7889 states and 10990 transitions. [2022-11-18 19:50:45,261 INFO L78 Accepts]: Start accepts. Automaton has 7889 states and 10990 transitions. Word has length 65 [2022-11-18 19:50:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:45,262 INFO L495 AbstractCegarLoop]: Abstraction has 7889 states and 10990 transitions. [2022-11-18 19:50:45,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 7889 states and 10990 transitions. [2022-11-18 19:50:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 19:50:45,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:45,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:45,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 19:50:45,269 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:45,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1363863293, now seen corresponding path program 1 times [2022-11-18 19:50:45,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:45,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667760544] [2022-11-18 19:50:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:45,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:45,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:45,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667760544] [2022-11-18 19:50:45,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667760544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:45,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:45,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:45,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118023355] [2022-11-18 19:50:45,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:45,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:50:45,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:45,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:50:45,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:45,372 INFO L87 Difference]: Start difference. First operand 7889 states and 10990 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:45,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:45,768 INFO L93 Difference]: Finished difference Result 11284 states and 15685 transitions. [2022-11-18 19:50:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:50:45,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-18 19:50:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:45,775 INFO L225 Difference]: With dead ends: 11284 [2022-11-18 19:50:45,776 INFO L226 Difference]: Without dead ends: 3420 [2022-11-18 19:50:45,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:45,783 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 34 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:45,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 172 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:50:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2022-11-18 19:50:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 3418. [2022-11-18 19:50:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3417 states have (on average 1.3590869183494294) internal successors, (4644), 3417 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 4644 transitions. [2022-11-18 19:50:46,158 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 4644 transitions. Word has length 66 [2022-11-18 19:50:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:46,158 INFO L495 AbstractCegarLoop]: Abstraction has 3418 states and 4644 transitions. [2022-11-18 19:50:46,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 4644 transitions. [2022-11-18 19:50:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:50:46,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:46,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:46,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 19:50:46,160 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:46,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1441709853, now seen corresponding path program 1 times [2022-11-18 19:50:46,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:46,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294020989] [2022-11-18 19:50:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:46,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:46,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294020989] [2022-11-18 19:50:46,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294020989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037627563] [2022-11-18 19:50:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:46,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:46,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:46,647 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:46,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:50:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:46,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:50:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:47,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:49,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037627563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:49,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:49,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2022-11-18 19:50:49,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130568719] [2022-11-18 19:50:49,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:49,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 19:50:49,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:49,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 19:50:49,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-11-18 19:50:49,259 INFO L87 Difference]: Start difference. First operand 3418 states and 4644 transitions. Second operand has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:50:53,913 INFO L93 Difference]: Finished difference Result 21525 states and 28728 transitions. [2022-11-18 19:50:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 19:50:53,914 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-18 19:50:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:50:53,950 INFO L225 Difference]: With dead ends: 21525 [2022-11-18 19:50:53,951 INFO L226 Difference]: Without dead ends: 18144 [2022-11-18 19:50:53,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1290, Invalid=3822, Unknown=0, NotChecked=0, Total=5112 [2022-11-18 19:50:53,960 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1945 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1945 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:50:53,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1945 Valid, 1326 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 19:50:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18144 states. [2022-11-18 19:50:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18144 to 7763. [2022-11-18 19:50:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7763 states, 7762 states have (on average 1.3347075496006184) internal successors, (10360), 7762 states have internal predecessors, (10360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7763 states to 7763 states and 10360 transitions. [2022-11-18 19:50:54,923 INFO L78 Accepts]: Start accepts. Automaton has 7763 states and 10360 transitions. Word has length 68 [2022-11-18 19:50:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:50:54,923 INFO L495 AbstractCegarLoop]: Abstraction has 7763 states and 10360 transitions. [2022-11-18 19:50:54,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:54,924 INFO L276 IsEmpty]: Start isEmpty. Operand 7763 states and 10360 transitions. [2022-11-18 19:50:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:50:54,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:50:54,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:54,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 19:50:55,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 19:50:55,131 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:50:55,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:55,132 INFO L85 PathProgramCache]: Analyzing trace with hash -737912097, now seen corresponding path program 1 times [2022-11-18 19:50:55,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:55,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233857167] [2022-11-18 19:50:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:55,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:55,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:55,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233857167] [2022-11-18 19:50:55,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233857167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:55,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568964868] [2022-11-18 19:50:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:55,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:55,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:55,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:55,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:50:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:55,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:50:55,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:56,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:57,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568964868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:57,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:57,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2022-11-18 19:50:57,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488827235] [2022-11-18 19:50:57,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:57,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 19:50:57,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 19:50:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-11-18 19:50:57,806 INFO L87 Difference]: Start difference. First operand 7763 states and 10360 transitions. Second operand has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:01,612 INFO L93 Difference]: Finished difference Result 24445 states and 32629 transitions. [2022-11-18 19:51:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 19:51:01,613 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-18 19:51:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:01,648 INFO L225 Difference]: With dead ends: 24445 [2022-11-18 19:51:01,648 INFO L226 Difference]: Without dead ends: 16750 [2022-11-18 19:51:01,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=991, Invalid=2915, Unknown=0, NotChecked=0, Total=3906 [2022-11-18 19:51:01,660 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 2036 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2036 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:01,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2036 Valid, 1300 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:51:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16750 states. [2022-11-18 19:51:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16750 to 7988. [2022-11-18 19:51:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7988 states, 7987 states have (on average 1.3342932264930512) internal successors, (10657), 7987 states have internal predecessors, (10657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7988 states to 7988 states and 10657 transitions. [2022-11-18 19:51:02,636 INFO L78 Accepts]: Start accepts. Automaton has 7988 states and 10657 transitions. Word has length 68 [2022-11-18 19:51:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:02,636 INFO L495 AbstractCegarLoop]: Abstraction has 7988 states and 10657 transitions. [2022-11-18 19:51:02,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 7988 states and 10657 transitions. [2022-11-18 19:51:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:51:02,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:02,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:02,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:02,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 19:51:02,849 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:02,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1946824194, now seen corresponding path program 1 times [2022-11-18 19:51:02,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:02,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396651142] [2022-11-18 19:51:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:02,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:02,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:02,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396651142] [2022-11-18 19:51:02,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396651142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:02,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:02,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:51:02,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892145818] [2022-11-18 19:51:02,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:02,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:51:02,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:02,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:51:02,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:02,922 INFO L87 Difference]: Start difference. First operand 7988 states and 10657 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:03,455 INFO L93 Difference]: Finished difference Result 12065 states and 16074 transitions. [2022-11-18 19:51:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:51:03,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-18 19:51:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:03,466 INFO L225 Difference]: With dead ends: 12065 [2022-11-18 19:51:03,466 INFO L226 Difference]: Without dead ends: 5204 [2022-11-18 19:51:03,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:03,474 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 23 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:03,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 153 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:51:03,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2022-11-18 19:51:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 5202. [2022-11-18 19:51:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5202 states, 5201 states have (on average 1.2999423187848491) internal successors, (6761), 5201 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5202 states to 5202 states and 6761 transitions. [2022-11-18 19:51:04,150 INFO L78 Accepts]: Start accepts. Automaton has 5202 states and 6761 transitions. Word has length 68 [2022-11-18 19:51:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:04,151 INFO L495 AbstractCegarLoop]: Abstraction has 5202 states and 6761 transitions. [2022-11-18 19:51:04,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 5202 states and 6761 transitions. [2022-11-18 19:51:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:51:04,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:04,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:04,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 19:51:04,154 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1394499805, now seen corresponding path program 1 times [2022-11-18 19:51:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:04,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770812333] [2022-11-18 19:51:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:04,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:04,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770812333] [2022-11-18 19:51:04,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770812333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:04,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120210484] [2022-11-18 19:51:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:04,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:04,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:04,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:51:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:04,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:51:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:05,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:51:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:06,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120210484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:51:06,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:51:06,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 28 [2022-11-18 19:51:06,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113442674] [2022-11-18 19:51:06,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:51:06,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 19:51:06,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 19:51:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-11-18 19:51:06,540 INFO L87 Difference]: Start difference. First operand 5202 states and 6761 transitions. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:10,934 INFO L93 Difference]: Finished difference Result 28902 states and 36533 transitions. [2022-11-18 19:51:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 19:51:10,935 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-18 19:51:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:10,961 INFO L225 Difference]: With dead ends: 28902 [2022-11-18 19:51:10,961 INFO L226 Difference]: Without dead ends: 23757 [2022-11-18 19:51:10,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=562, Invalid=1790, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 19:51:10,970 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1461 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:10,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1461 Valid, 1125 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 19:51:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23757 states. [2022-11-18 19:51:12,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23757 to 11406. [2022-11-18 19:51:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11406 states, 11405 states have (on average 1.2590092064883822) internal successors, (14359), 11405 states have internal predecessors, (14359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11406 states to 11406 states and 14359 transitions. [2022-11-18 19:51:12,556 INFO L78 Accepts]: Start accepts. Automaton has 11406 states and 14359 transitions. Word has length 68 [2022-11-18 19:51:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:12,556 INFO L495 AbstractCegarLoop]: Abstraction has 11406 states and 14359 transitions. [2022-11-18 19:51:12,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 11406 states and 14359 transitions. [2022-11-18 19:51:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 19:51:12,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:12,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:12,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:12,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 19:51:12,764 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash -316968284, now seen corresponding path program 1 times [2022-11-18 19:51:12,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:12,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618798755] [2022-11-18 19:51:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:12,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:12,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618798755] [2022-11-18 19:51:12,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618798755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:12,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:12,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:51:12,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370373510] [2022-11-18 19:51:12,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:12,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:51:12,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:51:12,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:12,821 INFO L87 Difference]: Start difference. First operand 11406 states and 14359 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:14,914 INFO L93 Difference]: Finished difference Result 27350 states and 34407 transitions. [2022-11-18 19:51:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:51:14,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-18 19:51:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:14,929 INFO L225 Difference]: With dead ends: 27350 [2022-11-18 19:51:14,929 INFO L226 Difference]: Without dead ends: 16213 [2022-11-18 19:51:14,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:14,939 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 34 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:14,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 215 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:51:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16213 states. [2022-11-18 19:51:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16213 to 15317. [2022-11-18 19:51:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15317 states, 15316 states have (on average 1.2449725776965266) internal successors, (19068), 15316 states have internal predecessors, (19068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:17,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15317 states to 15317 states and 19068 transitions. [2022-11-18 19:51:17,039 INFO L78 Accepts]: Start accepts. Automaton has 15317 states and 19068 transitions. Word has length 69 [2022-11-18 19:51:17,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:17,039 INFO L495 AbstractCegarLoop]: Abstraction has 15317 states and 19068 transitions. [2022-11-18 19:51:17,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 15317 states and 19068 transitions. [2022-11-18 19:51:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 19:51:17,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:17,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:17,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 19:51:17,042 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:17,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:17,043 INFO L85 PathProgramCache]: Analyzing trace with hash 524526898, now seen corresponding path program 1 times [2022-11-18 19:51:17,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:17,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740728926] [2022-11-18 19:51:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:17,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:17,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:17,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740728926] [2022-11-18 19:51:17,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740728926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:17,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:17,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:51:17,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145564903] [2022-11-18 19:51:17,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:17,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:51:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:51:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:17,113 INFO L87 Difference]: Start difference. First operand 15317 states and 19068 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:19,974 INFO L93 Difference]: Finished difference Result 34349 states and 42955 transitions. [2022-11-18 19:51:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:51:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-18 19:51:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:19,994 INFO L225 Difference]: With dead ends: 34349 [2022-11-18 19:51:19,994 INFO L226 Difference]: Without dead ends: 20612 [2022-11-18 19:51:20,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:20,003 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 41 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:20,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 171 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:51:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20612 states. [2022-11-18 19:51:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20612 to 20610. [2022-11-18 19:51:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20610 states, 20609 states have (on average 1.2339269251297977) internal successors, (25430), 20609 states have internal predecessors, (25430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20610 states to 20610 states and 25430 transitions. [2022-11-18 19:51:22,908 INFO L78 Accepts]: Start accepts. Automaton has 20610 states and 25430 transitions. Word has length 69 [2022-11-18 19:51:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:22,908 INFO L495 AbstractCegarLoop]: Abstraction has 20610 states and 25430 transitions. [2022-11-18 19:51:22,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 20610 states and 25430 transitions. [2022-11-18 19:51:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 19:51:22,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:22,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:22,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 19:51:22,912 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:22,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1554454534, now seen corresponding path program 1 times [2022-11-18 19:51:22,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:22,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880824414] [2022-11-18 19:51:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:22,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:22,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880824414] [2022-11-18 19:51:22,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880824414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:22,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:22,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:51:22,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745641598] [2022-11-18 19:51:22,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:22,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:51:22,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:51:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:22,961 INFO L87 Difference]: Start difference. First operand 20610 states and 25430 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:25,130 INFO L93 Difference]: Finished difference Result 26561 states and 32682 transitions. [2022-11-18 19:51:25,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:51:25,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-18 19:51:25,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:25,147 INFO L225 Difference]: With dead ends: 26561 [2022-11-18 19:51:25,147 INFO L226 Difference]: Without dead ends: 17264 [2022-11-18 19:51:25,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:25,154 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 38 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:25,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 179 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:51:25,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17264 states. [2022-11-18 19:51:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17264 to 17262. [2022-11-18 19:51:28,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17262 states, 17261 states have (on average 1.21707896413881) internal successors, (21008), 17261 states have internal predecessors, (21008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17262 states to 17262 states and 21008 transitions. [2022-11-18 19:51:28,130 INFO L78 Accepts]: Start accepts. Automaton has 17262 states and 21008 transitions. Word has length 69 [2022-11-18 19:51:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:28,132 INFO L495 AbstractCegarLoop]: Abstraction has 17262 states and 21008 transitions. [2022-11-18 19:51:28,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:28,132 INFO L276 IsEmpty]: Start isEmpty. Operand 17262 states and 21008 transitions. [2022-11-18 19:51:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 19:51:28,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:28,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:28,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 19:51:28,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1061524558, now seen corresponding path program 1 times [2022-11-18 19:51:28,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:28,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939002086] [2022-11-18 19:51:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:28,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:28,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939002086] [2022-11-18 19:51:28,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939002086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:28,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:28,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:51:28,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135735068] [2022-11-18 19:51:28,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:28,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:51:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:51:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:28,183 INFO L87 Difference]: Start difference. First operand 17262 states and 21008 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:31,428 INFO L93 Difference]: Finished difference Result 38053 states and 46429 transitions. [2022-11-18 19:51:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:51:31,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-18 19:51:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:31,449 INFO L225 Difference]: With dead ends: 38053 [2022-11-18 19:51:31,449 INFO L226 Difference]: Without dead ends: 22798 [2022-11-18 19:51:31,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:31,458 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 35 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:31,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 195 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:51:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22798 states. [2022-11-18 19:51:34,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22798 to 22796. [2022-11-18 19:51:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22796 states, 22795 states have (on average 1.191708708050011) internal successors, (27165), 22795 states have internal predecessors, (27165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22796 states to 22796 states and 27165 transitions. [2022-11-18 19:51:34,629 INFO L78 Accepts]: Start accepts. Automaton has 22796 states and 27165 transitions. Word has length 69 [2022-11-18 19:51:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:34,629 INFO L495 AbstractCegarLoop]: Abstraction has 22796 states and 27165 transitions. [2022-11-18 19:51:34,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 22796 states and 27165 transitions. [2022-11-18 19:51:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 19:51:34,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:34,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:34,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 19:51:34,633 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1094010052, now seen corresponding path program 1 times [2022-11-18 19:51:34,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:34,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551042332] [2022-11-18 19:51:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:34,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:34,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551042332] [2022-11-18 19:51:34,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551042332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:34,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:34,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:51:34,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069163936] [2022-11-18 19:51:34,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:34,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:51:34,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:34,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:51:34,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:34,678 INFO L87 Difference]: Start difference. First operand 22796 states and 27165 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:38,560 INFO L93 Difference]: Finished difference Result 36398 states and 43239 transitions. [2022-11-18 19:51:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:51:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-18 19:51:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:38,580 INFO L225 Difference]: With dead ends: 36398 [2022-11-18 19:51:38,580 INFO L226 Difference]: Without dead ends: 22251 [2022-11-18 19:51:38,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:38,586 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 35 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:38,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 214 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:51:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22251 states. [2022-11-18 19:51:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22251 to 21232. [2022-11-18 19:51:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21232 states, 21231 states have (on average 1.17686401959399) internal successors, (24986), 21231 states have internal predecessors, (24986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21232 states to 21232 states and 24986 transitions. [2022-11-18 19:51:41,689 INFO L78 Accepts]: Start accepts. Automaton has 21232 states and 24986 transitions. Word has length 69 [2022-11-18 19:51:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:41,689 INFO L495 AbstractCegarLoop]: Abstraction has 21232 states and 24986 transitions. [2022-11-18 19:51:41,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:41,689 INFO L276 IsEmpty]: Start isEmpty. Operand 21232 states and 24986 transitions. [2022-11-18 19:51:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 19:51:41,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:41,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:41,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 19:51:41,693 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash -275378682, now seen corresponding path program 1 times [2022-11-18 19:51:41,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:41,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181167696] [2022-11-18 19:51:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:41,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:41,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:41,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181167696] [2022-11-18 19:51:41,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181167696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:41,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:41,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:51:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157392459] [2022-11-18 19:51:41,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:41,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:51:41,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:51:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:41,737 INFO L87 Difference]: Start difference. First operand 21232 states and 24986 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:45,112 INFO L93 Difference]: Finished difference Result 33468 states and 39278 transitions. [2022-11-18 19:51:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:51:45,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-18 19:51:45,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:45,134 INFO L225 Difference]: With dead ends: 33468 [2022-11-18 19:51:45,134 INFO L226 Difference]: Without dead ends: 19829 [2022-11-18 19:51:45,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:45,143 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 38 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:45,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 217 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:51:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19829 states. [2022-11-18 19:51:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19829 to 19023. [2022-11-18 19:51:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19023 states, 19022 states have (on average 1.1631269056881506) internal successors, (22125), 19022 states have internal predecessors, (22125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19023 states to 19023 states and 22125 transitions. [2022-11-18 19:51:47,985 INFO L78 Accepts]: Start accepts. Automaton has 19023 states and 22125 transitions. Word has length 69 [2022-11-18 19:51:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:47,985 INFO L495 AbstractCegarLoop]: Abstraction has 19023 states and 22125 transitions. [2022-11-18 19:51:47,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 19023 states and 22125 transitions. [2022-11-18 19:51:47,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 19:51:47,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:47,988 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:47,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 19:51:47,989 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1424960161, now seen corresponding path program 1 times [2022-11-18 19:51:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:47,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609216795] [2022-11-18 19:51:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:47,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:48,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:48,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609216795] [2022-11-18 19:51:48,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609216795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:48,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368381137] [2022-11-18 19:51:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:48,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:48,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:48,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:48,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:51:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:51:48,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:48,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:51:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:48,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368381137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:51:48,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:51:48,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-18 19:51:48,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842576766] [2022-11-18 19:51:48,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:51:48,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:51:48,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:51:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:51:48,565 INFO L87 Difference]: Start difference. First operand 19023 states and 22125 transitions. Second operand has 11 states, 11 states have (on average 11.0) internal successors, (121), 10 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:52,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:52,627 INFO L93 Difference]: Finished difference Result 25285 states and 29318 transitions. [2022-11-18 19:51:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:51:52,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 10 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-18 19:51:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:52,654 INFO L225 Difference]: With dead ends: 25285 [2022-11-18 19:51:52,654 INFO L226 Difference]: Without dead ends: 22173 [2022-11-18 19:51:52,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:51:52,660 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 484 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:52,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 245 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:51:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22173 states. [2022-11-18 19:51:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22173 to 18916. [2022-11-18 19:51:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18916 states, 18915 states have (on average 1.1601374570446736) internal successors, (21944), 18915 states have internal predecessors, (21944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18916 states to 18916 states and 21944 transitions. [2022-11-18 19:51:55,661 INFO L78 Accepts]: Start accepts. Automaton has 18916 states and 21944 transitions. Word has length 70 [2022-11-18 19:51:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:55,661 INFO L495 AbstractCegarLoop]: Abstraction has 18916 states and 21944 transitions. [2022-11-18 19:51:55,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 10 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 18916 states and 21944 transitions. [2022-11-18 19:51:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 19:51:55,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:55,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:55,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:55,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:55,871 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1355477905, now seen corresponding path program 1 times [2022-11-18 19:51:55,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:55,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622751013] [2022-11-18 19:51:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:55,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:57,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:57,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622751013] [2022-11-18 19:51:57,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622751013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:57,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246788075] [2022-11-18 19:51:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:57,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:57,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:57,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:57,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:51:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:57,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:51:57,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:58,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:52:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:03,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246788075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:52:03,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:52:03,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 15] total 43 [2022-11-18 19:52:03,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706475657] [2022-11-18 19:52:03,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:52:03,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 19:52:03,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 19:52:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 19:52:03,187 INFO L87 Difference]: Start difference. First operand 18916 states and 21944 transitions. Second operand has 43 states, 43 states have (on average 4.511627906976744) internal successors, (194), 43 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:34,060 INFO L93 Difference]: Finished difference Result 56097 states and 65024 transitions. [2022-11-18 19:53:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 395 states. [2022-11-18 19:53:34,060 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.511627906976744) internal successors, (194), 43 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-18 19:53:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:34,114 INFO L225 Difference]: With dead ends: 56097 [2022-11-18 19:53:34,114 INFO L226 Difference]: Without dead ends: 50074 [2022-11-18 19:53:34,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 106 SyntacticMatches, 11 SemanticMatches, 434 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82635 ImplicationChecksByTransitivity, 75.9s TimeCoverageRelationStatistics Valid=25999, Invalid=163661, Unknown=0, NotChecked=0, Total=189660 [2022-11-18 19:53:34,146 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 12618 mSDsluCounter, 5396 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12618 SdHoareTripleChecker+Valid, 5667 SdHoareTripleChecker+Invalid, 4550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:53:34,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12618 Valid, 5667 Invalid, 4550 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [497 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-18 19:53:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50074 states. [2022-11-18 19:53:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50074 to 17334. [2022-11-18 19:53:37,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17334 states, 17333 states have (on average 1.1573876420700397) internal successors, (20061), 17333 states have internal predecessors, (20061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17334 states to 17334 states and 20061 transitions. [2022-11-18 19:53:37,879 INFO L78 Accepts]: Start accepts. Automaton has 17334 states and 20061 transitions. Word has length 70 [2022-11-18 19:53:37,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:37,879 INFO L495 AbstractCegarLoop]: Abstraction has 17334 states and 20061 transitions. [2022-11-18 19:53:37,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.511627906976744) internal successors, (194), 43 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:37,879 INFO L276 IsEmpty]: Start isEmpty. Operand 17334 states and 20061 transitions. [2022-11-18 19:53:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 19:53:37,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:37,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:37,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:38,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 19:53:38,087 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1404516557, now seen corresponding path program 1 times [2022-11-18 19:53:38,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:38,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283242326] [2022-11-18 19:53:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:38,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:38,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:38,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283242326] [2022-11-18 19:53:38,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283242326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:53:38,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807654094] [2022-11-18 19:53:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:38,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:38,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:38,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:38,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:53:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:53:39,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:41,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:44,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807654094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:53:44,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:53:44,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 38 [2022-11-18 19:53:44,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814914388] [2022-11-18 19:53:44,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:53:44,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 19:53:44,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 19:53:44,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 19:53:44,351 INFO L87 Difference]: Start difference. First operand 17334 states and 20061 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:54:27,925 INFO L93 Difference]: Finished difference Result 40088 states and 45841 transitions. [2022-11-18 19:54:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-11-18 19:54:27,926 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-18 19:54:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:54:27,955 INFO L225 Difference]: With dead ends: 40088 [2022-11-18 19:54:27,955 INFO L226 Difference]: Without dead ends: 33135 [2022-11-18 19:54:27,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23229 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=9720, Invalid=43872, Unknown=0, NotChecked=0, Total=53592 [2022-11-18 19:54:27,965 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 4880 mSDsluCounter, 5179 mSDsCounter, 0 mSdLazyCounter, 3343 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4880 SdHoareTripleChecker+Valid, 5414 SdHoareTripleChecker+Invalid, 3549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:54:27,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4880 Valid, 5414 Invalid, 3549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3343 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-18 19:54:27,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33135 states. [2022-11-18 19:54:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33135 to 14286. [2022-11-18 19:54:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14286 states, 14285 states have (on average 1.152397619880994) internal successors, (16462), 14285 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14286 states to 14286 states and 16462 transitions. [2022-11-18 19:54:31,704 INFO L78 Accepts]: Start accepts. Automaton has 14286 states and 16462 transitions. Word has length 70 [2022-11-18 19:54:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:54:31,704 INFO L495 AbstractCegarLoop]: Abstraction has 14286 states and 16462 transitions. [2022-11-18 19:54:31,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 14286 states and 16462 transitions. [2022-11-18 19:54:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-18 19:54:31,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:54:31,711 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:31,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:31,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 19:54:31,917 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:54:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:31,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1853227704, now seen corresponding path program 1 times [2022-11-18 19:54:31,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:31,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998534597] [2022-11-18 19:54:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:31,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 19:54:32,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:32,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998534597] [2022-11-18 19:54:32,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998534597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:32,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030591322] [2022-11-18 19:54:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:32,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:32,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:32,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:32,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:54:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:54:32,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 19:54:32,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:54:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 19:54:32,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030591322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:54:32,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:54:32,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-18 19:54:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109579548] [2022-11-18 19:54:32,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:54:32,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:54:32,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:54:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:54:32,502 INFO L87 Difference]: Start difference. First operand 14286 states and 16462 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:54:38,058 INFO L93 Difference]: Finished difference Result 20711 states and 24121 transitions. [2022-11-18 19:54:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:54:38,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-11-18 19:54:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:54:38,074 INFO L225 Difference]: With dead ends: 20711 [2022-11-18 19:54:38,074 INFO L226 Difference]: Without dead ends: 18437 [2022-11-18 19:54:38,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-11-18 19:54:38,078 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 868 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:54:38,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 340 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:54:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18437 states. [2022-11-18 19:54:41,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18437 to 13822. [2022-11-18 19:54:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.15107445192099) internal successors, (15909), 13821 states have internal predecessors, (15909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 15909 transitions. [2022-11-18 19:54:41,577 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 15909 transitions. Word has length 115 [2022-11-18 19:54:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:54:41,577 INFO L495 AbstractCegarLoop]: Abstraction has 13822 states and 15909 transitions. [2022-11-18 19:54:41,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 15909 transitions. [2022-11-18 19:54:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-18 19:54:41,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:54:41,581 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:41,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:41,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 19:54:41,782 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:54:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash 690536508, now seen corresponding path program 1 times [2022-11-18 19:54:41,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:41,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369876083] [2022-11-18 19:54:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:41,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:54:41,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:41,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369876083] [2022-11-18 19:54:41,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369876083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:41,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628456319] [2022-11-18 19:54:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:41,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:41,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:41,913 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:41,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:54:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:54:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:54:42,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:54:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:54:42,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628456319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:54:42,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:54:42,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-18 19:54:42,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094445604] [2022-11-18 19:54:42,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:54:42,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:54:42,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:42,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:54:42,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:54:42,374 INFO L87 Difference]: Start difference. First operand 13822 states and 15909 transitions. Second operand has 16 states, 16 states have (on average 12.375) internal successors, (198), 15 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:54:48,042 INFO L93 Difference]: Finished difference Result 21096 states and 24385 transitions. [2022-11-18 19:54:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:54:48,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.375) internal successors, (198), 15 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-11-18 19:54:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:54:48,058 INFO L225 Difference]: With dead ends: 21096 [2022-11-18 19:54:48,058 INFO L226 Difference]: Without dead ends: 18253 [2022-11-18 19:54:48,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:54:48,062 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 624 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:54:48,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 417 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:54:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18253 states. [2022-11-18 19:54:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18253 to 13427. [2022-11-18 19:54:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13427 states, 13426 states have (on average 1.1474005660658424) internal successors, (15405), 13426 states have internal predecessors, (15405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13427 states to 13427 states and 15405 transitions. [2022-11-18 19:54:51,555 INFO L78 Accepts]: Start accepts. Automaton has 13427 states and 15405 transitions. Word has length 115 [2022-11-18 19:54:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:54:51,555 INFO L495 AbstractCegarLoop]: Abstraction has 13427 states and 15405 transitions. [2022-11-18 19:54:51,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.375) internal successors, (198), 15 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:54:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 13427 states and 15405 transitions. [2022-11-18 19:54:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-18 19:54:51,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:54:51,558 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:51,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:51,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 19:54:51,759 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:54:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2029584764, now seen corresponding path program 1 times [2022-11-18 19:54:51,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:51,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193644732] [2022-11-18 19:54:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:51,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:53,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193644732] [2022-11-18 19:54:53,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193644732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:54:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681484653] [2022-11-18 19:54:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:53,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:53,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:53,162 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:53,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:54:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:53,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 19:54:53,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:54:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:54:55,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:02,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681484653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:55:02,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:55:02,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 52 [2022-11-18 19:55:02,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083400228] [2022-11-18 19:55:02,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:02,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 19:55:02,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:55:02,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 19:55:02,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2375, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 19:55:02,008 INFO L87 Difference]: Start difference. First operand 13427 states and 15405 transitions. Second operand has 52 states, 52 states have (on average 6.4423076923076925) internal successors, (335), 52 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:55:51,056 INFO L93 Difference]: Finished difference Result 31864 states and 36216 transitions. [2022-11-18 19:55:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-11-18 19:55:51,064 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.4423076923076925) internal successors, (335), 52 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-18 19:55:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:55:51,091 INFO L225 Difference]: With dead ends: 31864 [2022-11-18 19:55:51,091 INFO L226 Difference]: Without dead ends: 30377 [2022-11-18 19:55:51,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19625 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=8212, Invalid=46310, Unknown=0, NotChecked=0, Total=54522 [2022-11-18 19:55:51,098 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 5657 mSDsluCounter, 7202 mSDsCounter, 0 mSdLazyCounter, 5177 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5657 SdHoareTripleChecker+Valid, 7646 SdHoareTripleChecker+Invalid, 5476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 5177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:55:51,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5657 Valid, 7646 Invalid, 5476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [299 Valid, 5177 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-18 19:55:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30377 states. [2022-11-18 19:55:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30377 to 14322. [2022-11-18 19:55:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14322 states, 14321 states have (on average 1.1456602192584318) internal successors, (16407), 14321 states have internal predecessors, (16407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14322 states to 14322 states and 16407 transitions. [2022-11-18 19:55:55,699 INFO L78 Accepts]: Start accepts. Automaton has 14322 states and 16407 transitions. Word has length 117 [2022-11-18 19:55:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:55:55,699 INFO L495 AbstractCegarLoop]: Abstraction has 14322 states and 16407 transitions. [2022-11-18 19:55:55,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.4423076923076925) internal successors, (335), 52 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:55:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 14322 states and 16407 transitions. [2022-11-18 19:55:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-18 19:55:55,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:55:55,702 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:55,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:55:55,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 19:55:55,903 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:55:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:55,904 INFO L85 PathProgramCache]: Analyzing trace with hash 43675942, now seen corresponding path program 1 times [2022-11-18 19:55:55,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:55:55,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830307098] [2022-11-18 19:55:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:55,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:55:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:57,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:55:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830307098] [2022-11-18 19:55:57,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830307098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:55:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399238423] [2022-11-18 19:55:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:55:57,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:55:57,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:55:57,818 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:55:57,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf325d2a-1ad1-4a6c-b8c4-231edf12d88b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 19:55:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 19:55:57,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:56:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:08,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:56:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:56:19,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399238423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:56:19,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:56:19,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 65 [2022-11-18 19:56:19,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963644277] [2022-11-18 19:56:19,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:56:19,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-18 19:56:19,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:56:19,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-18 19:56:19,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=3836, Unknown=2, NotChecked=0, Total=4160 [2022-11-18 19:56:19,557 INFO L87 Difference]: Start difference. First operand 14322 states and 16407 transitions. Second operand has 65 states, 65 states have (on average 5.153846153846154) internal successors, (335), 65 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)